Let T-l(n) denote the number of l-regular partition triples of n. In this paper, we consider the arithmetic properties of T-7(n). An infinite family of congruences modulo powers of 7 and several congruences modulo 7 are established. For instance, we prove that for all n >= 0 and alpha >= 1, T-7 (7(2 alpha)n + 3 x 7(2 alpha) - 3/4) equivalent to 0 (mod 7(alpha)).